17beta-(dialkylaminoalkyl) aminoestra-1, 3, 5(10)-trien-3-ols, alkyl and acyl derivatives thereof



United States Patent 175 (DIALKYLAMWUALKYDAMINOESTRA 1,3,

5(10)-TRllEN-3-0LS, ALKYL AND ACYL DERIVA- TIWES THEREOF Paul D. Klirnstra, Northbroolr, 111., assignor to G. D.

Searle & (10., Chicago, llll., a corporation of Delaware No Drawing. Filed Feb. 8, 1965, Ser. No. 431,183

11 Claims. (Cl. Mil-397.4)

The present invention relates to novel steroidal diamines and alkyl and acyl derivatives corresponding. More particularly, the substances are 17,B-N-(dialkylaminoalkyl) aminoestra-1,3,5()-trien-3-ols and alkyl and acyl derivatives thereof and can be represented by the following structural formula wherein R can be hydrogen or a formyl or lower alkyl radical, R is hydrogen, a formyl or methyl radical, and Alk is symbolic of a lower alkylene radical.

The lower alkylene radicals encompassed by the foregoing structural formula are represented by the formula and are typified by methylene, ethylene, trimethylene, tetramethylene, pentamethylene, and the branched-chain radicals isomeric therewith. Examples of the lower alkyl radicals therein depicted are methyl, ethyl, propyl, butyl, pentyl, heXyl, heptyl, and the branched-chain radicals thereof.

Equivalent to the instant amines for the purposes of this invention are the corresponding non-toxic acid addition and quaternary salts which are exemplified by the citrate, tartrate, maleate, ascorbate, gluconate, lactate, succinate, phosphate, sulfate, hydrobromide, hydrochloride, ethiodide, methiodide, methochloride, methobrornide, methosulfate, and ethosulfate.

The compounds of this invention display useful and valuable pharmacological properties. They are hypocholesterolemic agents, for example, and they possess the particular advantage of minimal estrogenic side-effects. In addition, they are anti-hormonal agents as is evidenced by their ability to inhibit the anabolic activity of testosterone propionate. These compounds are also antibiotic substances in consequence of their anti-algal, anti-bacterial, anti-protozoal, and dicotyledenous seed germination-inhibitory activity. In particular, they possess the ability to inhibit the growth of organisms such as Chlorella vulgar-is, Diplococcus pneumoniae, and Tetrahymena gelleii.

The instant novel compounds are conveniently manufactured by utilizing as starting materials 3-oxygenated estra-1,3,5(10)-trien-17-ones of the structural formula wherein X is hydrogen or a lower alkyl or lower alkanoyl radical represented by the formula i C (lower alkyl) Condensation of those ketones with the appropriate aliphatic diamine in the presence of formic acid results in the corresponding 3-oxygenated 17fi-N-(w-dialkylaminoalkyl)-formamidoestra-1,3,5(10)-trienes of the structural formula l N-Alk-N (lower alkyl);

hand, typically with a suitable chemical reducing agent,-

affords the instant N-methyl compounds. As a specific example, 176 N-(3-dimethylaminopropyl)formamidoestra-1,3,5 (10)-trien-3-ol 3-methyl ether is contacted with lithium aluminum hydride in dioxane to produce 17fl-N- (3-dimethy1aminopropyl)-N-methylaminoestra-1,3,5( 1O trien-3-ol 3-methyl ether.

An alternate route to the N-methyl compounds of this invention involves alkylation of the corresponding compounds possessing a secondary-amino nitrogen substituent at carbon atom 17. Reaction of 17B-N-(3-dimethylaminopropyl)aminoestra-1,3,5( l0)-trien-3-ol 3-rnethyl ether with formic acid and formaldehyde thus results in the aforementioned 175-N-(3-dimethylaminopropyl)-N-rnethylaminoestra-l,3,5(10)-trien-3-ol 3-methyl ether.

The instant compounds wherein R is hydrogen can be produced alternatively by reaction between the aforementioned 17-ketones and diamines in the presence of an acidic catalyst. The amines thus obtained are then reduced, either chemically or by catalytic hydrogenation, to produce the instant substances. A specific example is the reaction of 3-hydroxyestra-1,3,5(10)-trien-17-one with 3-dimethylaminopropylamine in the presence of p-toluenesulfonic acid to afford 17-N-(3-dimethylaminopropyl)iminoestra 1,3,5 (10) trien 3 01, which is contacted with lithium aluminum hydride to yield the instant 17 3 N (3 dimethylaminopropyl)aminoestra-1,3,5(10)- trien-3-ol.

The invention is illustrated more fully by the examples which follow. These examples are set forth by way of illustration only and it will be understood that the invention is not to be construed as limited either in spirit or in scope by the details contained therein as many modifications both in materials and methods will be apparent to those skilled in the art. In these examples, temperatures are given in degrees centigrade C.). Quantities of materials are expressed in parts by weight unless otherwise noted.

Example 1 To a solution of 20 parts of 3-hydroxyestra 1,3,5 (10)- trien-17-one in 90 parts of formic acid is added dropwise, with cooling and stirring over a period of about 15 minutes, 40 parts of 3-dimethylaminopropylamine. The resulting reaction mixture is heated at 170l80 for about 72 hours, during which time the reaction mixture becomes homogenous. It is then cooled and poured carefully into an aqueous solution containing 80 parts of sodium hydroxide. That alkaline mixture is cooled to -5 then is extracted with chloroform, and the organic layer is separated, washed with water, dried over anhydrous sodium sulfate containing decolorizing carbon and stripped of solvent under reduced pressure. The resulting oily residue is crystallized from acetone to afford 17fi-N-(3- dimethylaminopropyl) formamidoestra 1,3,5 )-trien-3- o1 3-formate, melting at about 191-192.5 and displaying an optical rotation of +17.5 in chloroform. This compound is represented by the following structural formula CH0 CH N(CHz)a- Example 2 By substituting an equivalent quantity of Z-diethylaminoethylamine and otherwise proceeding according to the processes described in Example 1, there is obtained 17 3-N-(2-diethylaminoethyl)formamidoestra 1,3,5(10)- trien-3-o1 3-formate.

Example 3 on the filter with water, then is extracted with ethyl acetate. The resulting organic solution is separated, dried over anhydrous sodium sulfate containing decolorizing carbon and evaporated to dryness under reduced pressure. The solid residue is recrystallized from hexane to afford pure 17,6 N (3 dimethylaminopropyl formamidoestra- 1,3,5 (10)-trien-3-o1 3-methyl ether, melting at about 99- 100. This compound can be represented by the following structural formula Example 4 To an ethereal solution of 17,8 N (9 dimethylaminopropyl)formamidoestra 1,3,5( 10) trien 3 o1 3-methyl ether is added an equivalent quantity of isopropanolic hydrogen chloride. The resulting precipitate is collected by filtration and dried to afford 17p N (3 dimethylaminopropyl)formamidoestra 1,3,5(l0) trien 3 o1 3-methyl ether hydrochloride, characterized by an optical rotation, in ethanol, of +19".

Example 5 The substitution of equivalent quantities of 3 -ethoxyestra 1,3,5 (10) trien 17 one and 2 diethylaminoethylamine in the procedure of Example 3 results in N (2 diethylaminoethyl)formamidoestra 1,3,5 (10)- trien-3-ol 3-ethyl ether.

Example 6 To a solution of 17B-N-(3-dimethylaminopropyl)- formamidoestra-1,3,5(10)-trien-3-ol 3-formate in acetone is added excess isopropanolic hydrogen chloride. The resulting precipitate is recrystallized from ethanolhexane to afford 17B-N-(3-dirnethylaminopropyl)aminoestra-1,3, 5(10)-trien-3-ol dihydrochloride, characterized by the following structural formula CH3 on,

Example 7 By substituting an equivalent quantity of 17B-N-(2-diethylaminoethyl)formamidoestra 1,3,5(l0)-trien-3-ol 3- formate and otherwise proceeding according to the processes described in Example 6, there is obtained 17 fi-N-(Z- diethylaminoethyl)aminoestra 1,3,5 (10)-trien-3-ol dihydrochloride.

Example 8 that mixture removes the precipitated inorganic salts, which are washed on the filter with dioxane. The filtrate is evaporated to dryness under reduced pressure to afford 17p N (3-dimethylarninopropyl)-N-methylaminoestra- 1,3,5 l)-trien-3-ol 3-methyl ether as a low-melting solid. This substance is further characterized by an optical rotation, in chloroform, of +52.5 and also by the following structural formula Example 9 The substitution of an equivalent quantity of l7fl-N- (2 diethylaminoethyl)formamidoestra 1,3,5 (l0)-trien- 3-o1 3-formate in the procedure of Example 8 results in 17,8 N-(Z-diethylaminoethyl)-N-methylarninoestra-l,3,5 (l0) -trien-3-ol.

Example 10 By substituting an equivalent quantity of l7B-N-(2- diethylaminoethyl) formamidoestra 1,3,5 (10)-trien-3-ol 3-ethyl ether and otherwise proceeding according to the processes described in Example 8, there is obtained 17;?- N (2 diethylaminoethyl) N methylaminoestra-l,3,5 (l0)-trien-3-ol 3-ethyl ether.

Example 11 To a refluxing mixture of 4 parts of lithium aluminum hydride in 250 parts of dioxane, in an atmosphere of nitrogen, is added with stirring, over a period of about 30 minutes, a warm solution of 8 parts of 17B-N-(3-dimethylaminopropyl)formamidoestra l,3,5(l0) trien- 3-ol 3-formate in 150 parts of dioxane. Refluxing and stirring is continued for about 20 hours, after which time the reaction mixture is diluted successively with 8 parts of water, 6 parts by volume of 20% aqueous sodium hydroxide, and 25.6 parts of water. The precipitated inorganic salts are removed by filtration and washed on the filter with dioxane. Concentration of the filtrate to dryness under reduced pressure affords a glass-like residue which is recrystallized from acetone to afford pure 17(3- N (3 dimethylaminopropyl)-N-methylaminoestra-1,3,5 (l0)-trien-3-ol. This compound is characterized by infrared absorption maxima at about 2.75, 3.4, and 6.3 microns and also by an ultraviolet absorption maximum at about 280 millimicrons with a molecular extinction coefiicient of about 1,840. It can be represented by the following structural formula Example 12 To an ethereal solution of 17,8-N-(3-dimethylaminopropyl) N methylaminoestra 1,3,5 (10)-trien-3-ol 3- methyl ether is added excess isopropanolic hydrogen chloride, and the resulting precipitate is collected by filtration and dried to afford 17B-N-(3-dimethylamino- 6 propyl) N methylaminoestra 1,3,5 (10)-trien-3-ol 3- methyl ether dihydrochloride, characterized by an optical rotation, in chloroform, of +48.

Example 13 wherein R is a member of the class consisting of hydrogen, a formyl and a lower alkyl radical, R is selected from the group consisting of hydrogen, a (formyl and a methyl radical and Alk is a lower alkylene radical.

2. 17B N (3-dimethylarninopropyl) formarnidoestra- 1,3,5( 10) -trien-3-ol 3-formate.

3. A compound of the formula (lower alkyl) 0 wherein Alk is a lower alkylene radical.

4. 17,3 N (3-dimethylaminopropyl)-N-methylaminoestra-l,3,5 l0)-trien-3-ol S-methyl ether.

5. 17,8 N (3-dimethylaminopropyl)-N-methylaminoestra-1,3,S(l0)-trien-3-ol 3-rnethyl ether dihydrochloride.

6. A compound of the formula N-Alk-N (lower alkyl);

wherein Alk is a lower alkylene radical.

7. A compound of the formula H N-Alk-N (lower alkyl) 2 wherein Alk is a lower alkylene radical.

7 gr 8. 17 3 N (3-dimethylaminopropyl) aminoestra-l,3;5 10. 1713-N-(3-dimethylaminopropyl) formamidoestra-l, 10)-trien-3-ol dihydrochloride. 3,5 10) -trien-3-ol 3-methy1 ether.

9. A compound of the formula 11. 175-N-(3-dimethylarninopropyl) formarn-idoestra-1,

' 0 H3 3 ,5 10 -trien-3-ol 3 methyl ether hydrochloride.

No references cited. N-Alk-N (lower alkyl);

ELBERT L. ROBERTS, Acting Primary Examiner.

HENRY FRENCH, Assistant Examiner.

(lower a1kyl)0 wherein Alk is a lower alkylene radical. 15 

1. A COMPOUND OF THE FORMULA 3-(R-O-),17-((LOWER ALKYL)2-N-ALK-N(-R'')-)-1,3,5(10)ESTRATRIENE WHEREIN R IS A MEMBER OF THE CLASS CONSISTING OF HYDROGEN, A FORMYL AND A LOWER ALKYL RADICAL, R'' IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, A FORMYL AND A METHYL RADICAL AND ALK IS A LOWER ALKYLENE RADICAL. 